WO2006037515A1 - Device for regulating piston cooling of a reciprocating internal combustion engine - Google Patents

Device for regulating piston cooling of a reciprocating internal combustion engine Download PDF

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Publication number
WO2006037515A1
WO2006037515A1 PCT/EP2005/010407 EP2005010407W WO2006037515A1 WO 2006037515 A1 WO2006037515 A1 WO 2006037515A1 EP 2005010407 W EP2005010407 W EP 2005010407W WO 2006037515 A1 WO2006037515 A1 WO 2006037515A1
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WO
WIPO (PCT)
Prior art keywords
roller slide
spray
oil
crankshaft
internal combustion
Prior art date
Application number
PCT/EP2005/010407
Other languages
German (de)
French (fr)
Inventor
Robert Niklas
Original Assignee
Daimlerchrysler Ag
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Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006037515A1 publication Critical patent/WO2006037515A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets

Definitions

  • the invention relates to a device for controlling a piston cooling of a reciprocating internal combustion engine according to the preamble of claim 1.
  • a reciprocating internal combustion engine is known, the pistons are sprayed by spray nozzles on their combustion chamber bottom of a crankcase side with lubricating and cooling oil.
  • the spray nozzles are connected via an oil passage with a provided in a cylinder block Hauptöltik für in conjunction, which supplies usually via lubricating oil channels main bearing of a crankshaft with lubricating oil.
  • the oil channel is provided with a shut-off device for regulating the flow cross section, so that the amount of oil supplied to the respective oil nozzle is controlled by the shut-off device, which may comprise a solenoid valve.
  • the solenoid valve is electrically connected to a computing device, which controls the oil quantity supplied to the oil nozzle in dependence on parameters of the
  • Reciprocating internal combustion engine controls, e.g. from the speed, the load and / or the oil and cooling water temperature.
  • a device for controlling the piston cooling of internal combustion engines is known.
  • spray nozzles lubricating oil to the inner wall of the piston and the piston crown or in a special Collecting bore of the piston.
  • a cock is arranged for performance-dependent and quantitative control of the cooling oil, which has an open and a closed switching position. But it can also progressively acting means such as spring-loaded valves, needle valves or the like. Be provided.
  • the quantitative control of the cooling oil may be dependent on the performance of the engine and other parameters, such as the load, the boost pressure, the exhaust gas temperature, etc.
  • the oil passage leading to the spray nozzles may be connected to the main pressure oil line or a special Pump to be charged.
  • the invention has for its object to reduce the construction cost of the device and to simplify the installation. It is achieved according to the invention by the features of claim 1. Further advantageous embodiments will be apparent from the dependent claims.
  • a tubular roller slide is pivotally mounted in the Hauptdruck ⁇ l Arthur, which has control openings in the region of the branching spray oil channels through which the flow is controlled to the spray oil channels.
  • the roller slide In the area of the lubricating oil channels, the roller slide has openings extending in the circumferential direction, which enable the flow to the bearings of the crankshaft over the entire pivoting range of the roller slide.
  • the device according to the invention does not require an additional oil line in which a control common to all spray nozzles is arranged, e.g. a tap or a shut-off valve, it still requires several
  • Control devices each associated with a spray nozzle.
  • the installation space of the main pressure oil line is used by the roller slide, from which the spray oil passages branch off to the spray nozzles.
  • the roller slide is designed so that the lubricating oil supply to the other supply points of the lubrication circuit is not hindered.
  • the roller slide in the region of the control openings in the outer diameter is slightly increased and slides with a sealing gap on the inner wall of the main pressure oil line. Since the roller slide only needs to be processed in the areas with the enlarged outer diameter, sealing gaps can be produced with low manufacturing tolerances with little manufacturing effort.
  • Such a drive element may be a worm, helical or spur toothing, which is incorporated in the roller slide or connected as a separate component with the roller slide.
  • a suitable actuator such as a mechanically, hydraulically or electrically actuated actuator, a.
  • an oil-tight housing feedthrough is necessary for the actuator.
  • the roller slide In order to avoid that the roller slide is mounted incorrectly or can be adjusted over the permissible rotation angle range, whereby the lubricating oil supply of the main bearing of the crankshaft could be endangered, it is expedient that the roller slide has a device which prevents incorrect installation.
  • the roller slide on a front side on a recess which extends over the pivoting range of the roller slide. At the ends of the recess are
  • Limit stops which interact with at least one stop in the crankcase.
  • a reciprocating internal combustion engine 10 may be configured in single-row or multi-row design. It usually has a plurality of cylinders 12, which are usually arranged in a cylinder block 11 in rows. In the cylinder 12, a piston 13 which is sealed by piston rings 14 relative to the cylinder 12 and connected via a piston pin 15 and a connecting rod 16 with a crank pin 17 of a crankshaft is drivingly moves. This is rotatably mounted in a crankcase 18 and serves as the output shaft of the reciprocating internal combustion engine 10th
  • a main pressure oil line 19 is provided in the cylinder block 11 and in the crankcase 18, which is connected in the usual way via a filter, not shown, with a lubricating oil pump, not shown.
  • At least one spray nozzle 23 is connected to the main pressure oil line 19 via a spray oil channel 22 for each cylinder 12, through which more or less cooling oil in a spray oil jet 24 is sprayed through an opening 28 in a piston head 27 against a combustion chamber floor 25, as required.
  • a shaker space 26 Between the combustion chamber floor 25 and the piston head 27 there is a shaker space 26, in which the cooling oil sprayed onto the piston head 25 is distributed and for a short time dwells before it leaves through the opening 28 or a separate drain opening the shaker space 26 again.
  • the quantity of cooling oil which exits through the spray nozzles 23 is regulated by a tubular roller slide 20 which has a control opening 21 in the area of the mouth of the spray oil channel 22 into the main pressure oil line 19. This can be adjusted by rotating the roller slide 20 about its longitudinal axis between an open position and a closed position continuously or intermittently.
  • the actuator can be activated via an electronic control unit as a function of relevant operating parameters of the internal combustion engine 10.
  • openings 30 are provided in the roller valve in the area of the lubricating oil channels leading from the main pressure oil line 19 to the main bearings of the crankshaft extend in the circumferential direction over the pivoting range of the roller slide 20. Because at these openings 30 no control of the lubricating oil flow takes place, the openings 30 may also be provided in the areas of the roller slide 20 with a smaller outer diameter.
  • roller slide 20 can not be incorrectly inserted into the main pressure line 19, it has on a front side a recess 32 which has transversely to the circumferential direction stops 33 at their ends, which cooperate with a corresponding stop in the crankcase 18 or in the cylinder block 11. At the same time causes by the stops 33 that the roller slide 20 can not be adjusted beyond the intended pivoting range addition.

Abstract

The invention relates to a device for regulating piston cooling of a reciprocating internal combustion engine. Said device comprises a main hydraulic oil pipe from which lubricating oil ducts branch off to main bearings of a crankshaft and spray oil ducts branch off to spray nozzles used for cooling the pistons. A tubular drum gate is pivotally mounted in the main hydraulic oil pipe. Said drum gate is provided with control ports in the area of the branching spray oil ducts. Said control ports allow the flow to the spray oil ducts to be controlled. The drum gate is further provided with holes in the area of the lubricating oil ducts, said holes extending in the circumferential direction while enabling penetration to the bearings of the crankshaft along the entire pivoting range of the drum gate.

Description

Vorrichtung zum Regeln einer Kolbenkühlung einer Hubkolbenbrennkraftmaschine Apparatus for controlling a piston cooling of a reciprocating internal combustion engine
Die Erfindung betrifft eine Vorrichtung zum Regeln einer Kolbenkühlung einer Hubkolbenbrennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for controlling a piston cooling of a reciprocating internal combustion engine according to the preamble of claim 1.
Aus der DE 35 43 084 Al ist eine Hubkolbenbrennkraftmaschine bekannt, deren Kolben von Spritzdüsen an ihrem Brennraumboden von einer Kurbelgehäuseseite mit Schmier- und Kühlöl angespritzt werden. Die Spritzdüsen stehen über einen Ölkanal mit einer in einem Zylinderblock vorgesehenen Hauptöldruckleitung in Verbindung, die in der Regel über Schmierölkanäle Hauptlager einer Kurbelwelle mit Schmieröl versorgt. Der Ölkanal ist mit einer Absperreinrichtung zum Einregeln des Durchflussquerschnitts versehen, sodass die der jeweiligen Öldüse zugeführte Ölmenge durch die Absperreinrichtung geregelt wird, die ein Magnetventil umfassen kann. Das Magnetventil ist elektrisch an ein Rechengerät angeschlossen, das die der Öldüse zugeführte Ölmenge in Abhängigkeit von Parametern derFrom DE 35 43 084 Al a reciprocating internal combustion engine is known, the pistons are sprayed by spray nozzles on their combustion chamber bottom of a crankcase side with lubricating and cooling oil. The spray nozzles are connected via an oil passage with a provided in a cylinder block Hauptöldruckleitung in conjunction, which supplies usually via lubricating oil channels main bearing of a crankshaft with lubricating oil. The oil channel is provided with a shut-off device for regulating the flow cross section, so that the amount of oil supplied to the respective oil nozzle is controlled by the shut-off device, which may comprise a solenoid valve. The solenoid valve is electrically connected to a computing device, which controls the oil quantity supplied to the oil nozzle in dependence on parameters of the
Hubkolbenbrennkraftmaschine steuert, z.B. von der Drehzahl, von der Last und/oder von der Öl- und Kühlwassertemperatur.Reciprocating internal combustion engine controls, e.g. from the speed, the load and / or the oil and cooling water temperature.
Aus der DE-OS 16 01 435 ist eine Vorrichtung zur Regelung der Kolbenkühlung von Brennkraftmaschinen bekannt. Hierbei spritzen an einen Ölführungskanal der Brennkraftmaschine angeschlossene Spritzdüsen Schmieröl an die Innenwand des Kolbens und an den Kolbenboden oder auch in eine besondere Auffangbohrung des Kolbens. In dem Ölführungskanal ist zur leistungsabhängigen und mengenmäßigen Steuerung des Kühlöls ein Hahn angeordnet, der eine offene und eine geschlossene Schaltstellung aufweist. Es können aber auch progressiv wirkende Mittel wie federbelastete Ventile, Nadelventile oder dgl. vorgesehen werden. Die mengenmäßige Regelung des Kühlöls kann außer von der Leistung der Brennkraftmaschine auch von anderen Parametern abhängig sein, z.B. von der Last, dem Ladedruck, der Abgastemperatur usw. Der Ölkanal, der zu den Spritzdüsen führt, kann an die Hauptdruckölleitung angeschlossen sein oder von einer besonderen Pumpe beschickt werden.From DE-OS 16 01 435 a device for controlling the piston cooling of internal combustion engines is known. In this case, injected to an oil duct of the internal combustion engine spray nozzles lubricating oil to the inner wall of the piston and the piston crown or in a special Collecting bore of the piston. In the oil guide channel, a cock is arranged for performance-dependent and quantitative control of the cooling oil, which has an open and a closed switching position. But it can also progressively acting means such as spring-loaded valves, needle valves or the like. Be provided. The quantitative control of the cooling oil may be dependent on the performance of the engine and other parameters, such as the load, the boost pressure, the exhaust gas temperature, etc. The oil passage leading to the spray nozzles may be connected to the main pressure oil line or a special Pump to be charged.
Der Erfindung liegt die Aufgabe zugrunde, den Bauaufwand der Vorrichtung zu verringern und die Montage zu vereinfachen. Sie wird gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The invention has for its object to reduce the construction cost of the device and to simplify the installation. It is achieved according to the invention by the features of claim 1. Further advantageous embodiments will be apparent from the dependent claims.
Nach der Erfindung ist in der Hauptdruckδlleitung ein rohrförmiger Walzenschieber schwenkbar gelagert, der im Bereich der abzweigenden Spritzölkanäle Steueröffnungen aufweist, durch die der Durchfluss zu den Spritzölkanälen gesteuert wird. Im Bereich der Schmierölkanäle besitzt der Walzenschieber sich in Umfangsrichtung erstreckende Öffnungen, die über den gesamten Schwenkbereich des Walzenschiebers den Durchfluss zu den Lagern der Kurbelwelle ermöglichen. Die erfindungsgemäße Vorrichtung benötigt weder eine zusätzliche Ölleitung, in der ein für alle Spritzdüsen gemeinsames Steuerelement angeordnet ist, z.B. ein Hahn oder ein Absperrventil, noch bedarf es mehrereAccording to the invention, a tubular roller slide is pivotally mounted in the Hauptdruckδlleitung, which has control openings in the region of the branching spray oil channels through which the flow is controlled to the spray oil channels. In the area of the lubricating oil channels, the roller slide has openings extending in the circumferential direction, which enable the flow to the bearings of the crankshaft over the entire pivoting range of the roller slide. The device according to the invention does not require an additional oil line in which a control common to all spray nozzles is arranged, e.g. a tap or a shut-off valve, it still requires several
Steuereinrichtungen, die jeweils einer Spritzdüse zugeordnet sind. Vielmehr wird durch den Walzenschieber der Bauraum der Hauptdruckölleitung genutzt, von der die Spritzölkanäle zu den Spritzdüsen abzweigen. Dabei ist der Walzenschieber so ausgebildet, dass die Schmierölzufuhr zu den übrigen Versorgungsstellen des Schmierkreislaufs nicht behindert ist. Zweckmäßigerweise ist der Walzenschieber im Bereich der Steueröffnungen im Außendurchmesser geringfügig vergrößert und gleitet mit einem Dichtspalt an der Innenwand der Hauptdruckölleitung. Da der Walzenschieber nur in den Bereichen mit dem vergrößerten Außendurchmesser bearbeitet zu werden braucht, können mit geringem Fertigungsaufwand Dichtspalte mit geringen Fertigungstoleranzen hergestellt werden. Gleichzeitig ist es zweckmäßig, an dem Walzenschieber ein Antriebselement anzubringen, das von einem Aktuator betätigt wird. Ein solches Antriebselement kann eine Schneckenrad-, Schraubenrad- oder Stirnradverzahnung sein, die in den Walzenschieber eingearbeitet oder als separates Bauelement mit dem Walzenschieber verbunden ist. In ein solches Antriebselement greift der Abtrieb eines geeigneten Aktuators, z.B. eines mechanisch, hydraulisch oder elektrisch betätigten Aktuators, ein. Für den Aktuator ist eine öldichte Gehäusedurchführung notwendig.Control devices, each associated with a spray nozzle. Rather, the installation space of the main pressure oil line is used by the roller slide, from which the spray oil passages branch off to the spray nozzles. In this case, the roller slide is designed so that the lubricating oil supply to the other supply points of the lubrication circuit is not hindered. Conveniently, the roller slide in the region of the control openings in the outer diameter is slightly increased and slides with a sealing gap on the inner wall of the main pressure oil line. Since the roller slide only needs to be processed in the areas with the enlarged outer diameter, sealing gaps can be produced with low manufacturing tolerances with little manufacturing effort. At the same time it is expedient to attach to the roller slide a drive element which is actuated by an actuator. Such a drive element may be a worm, helical or spur toothing, which is incorporated in the roller slide or connected as a separate component with the roller slide. In such a drive element engages the output of a suitable actuator, such as a mechanically, hydraulically or electrically actuated actuator, a. For the actuator, an oil-tight housing feedthrough is necessary.
Um zu vermeiden, dass der Walzenschieber falsch montiert wird oder sich über den zulässigen Drehwinkelbereich verstellen kann, wodurch die Schmierölversorgung der Hauptlager der Kurbelwelle gefährdet sein könnte, ist es zweckmäßig, dass der Walzenschieber eine Einrichtung besitzt, die eine Fehlmontage verhindert. Zu diesem Zweck weist der Walzenschieber an einer Stirnseite eine Aussparung auf, die sich über den Schwenkbereich des Walzenschiebers erstreckt. An den Enden der Aussparung befinden sichIn order to avoid that the roller slide is mounted incorrectly or can be adjusted over the permissible rotation angle range, whereby the lubricating oil supply of the main bearing of the crankshaft could be endangered, it is expedient that the roller slide has a device which prevents incorrect installation. For this purpose, the roller slide on a front side on a recess which extends over the pivoting range of the roller slide. At the ends of the recess are
Begrenzungsanschläge, die mit mindestens einem Anschlag im Kurbelgehäuse zusammenwirken.Limit stops, which interact with at least one stop in the crankcase.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Korabinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The skilled person will become the characteristics expediently also consider individually and summarize to meaningful further Korabinationen.
Dabei zeigen:Showing:
Fig. 1 einen schematischen Teilquerschnitt durch eine1 shows a schematic partial cross section through a
Zylindereinheit und Fig. 2 perspektivische Teilansicht eines erfindungsgemäßenCylinder unit and Fig. 2 perspective partial view of an inventive
Walzenschiebers.Roller slide.
Eine Hubkolbenbrennkraftmaschine 10 kann in Einreihen- oder Mehrreihen-Bauweise ausgebildet sein. Sie besitzt in der Regel mehrere Zylinder 12, die in einem Zylinderblock 11 üblicherweise in Reihen angeordnet sind. In dem Zylinder 12 bewegt sich ein Kolben 13, der durch Kolbenringe 14 gegenüber dem Zylinder 12 abgedichtet und über einen Kolbenbolzen 15 und eine Pleuelstange 16 mit einem Hubzapfen 17 einer Kurbelwelle triebmäßig verbunden ist. Diese ist in einem Kurbelgehäuse 18 drehbar gelagert und dient als Abtriebswelle der Hubkolbenbrennkraftmaschine 10.A reciprocating internal combustion engine 10 may be configured in single-row or multi-row design. It usually has a plurality of cylinders 12, which are usually arranged in a cylinder block 11 in rows. In the cylinder 12, a piston 13 which is sealed by piston rings 14 relative to the cylinder 12 and connected via a piston pin 15 and a connecting rod 16 with a crank pin 17 of a crankshaft is drivingly moves. This is rotatably mounted in a crankcase 18 and serves as the output shaft of the reciprocating internal combustion engine 10th
Zum Schmieren der Hauptlager der Kurbelwelle und darüber hinaus der Hubzapfen 17 und Kolbenbolzen 15 ist im Zylinderblock 11 bzw. im Kurbelgehäuse 18 eine Hauptdruckölleitung 19 vorgesehen, die in üblicher Weise über einen nicht dargestellten Filter mit einer nicht dargestellten Schmierölpumpe verbunden ist. An die Hauptdruckölleitung 19 ist über einen Spritzölkanal 22 für jeden Zylinder 12 mindestens eine Spritzdüse 23 angeschlossen, durch die je nach Bedarf mehr oder weniger Kühlöl in einem Spritzölstrahl 24 durch eine Öffnung 28 in einem Kolbenboden 27 gegen einen Brennraumboden 25 gespritzt wird. Zwischen dem Brennraumboden 25 und dem Kolbenboden 27 befindet sich ein Shakerraum 26, in dem sich das an den Kolbenboden 25 gespritzte Kühlöl verteilt und eine kurze Zeit verweilt, bevor es durch die Öffnung 28 oder eine separate Abflussöffnung den Shakerraum 26 wieder verlässt.For lubricating the main bearing of the crankshaft and beyond the crank pin 17 and piston pin 15, a main pressure oil line 19 is provided in the cylinder block 11 and in the crankcase 18, which is connected in the usual way via a filter, not shown, with a lubricating oil pump, not shown. At least one spray nozzle 23 is connected to the main pressure oil line 19 via a spray oil channel 22 for each cylinder 12, through which more or less cooling oil in a spray oil jet 24 is sprayed through an opening 28 in a piston head 27 against a combustion chamber floor 25, as required. Between the combustion chamber floor 25 and the piston head 27 there is a shaker space 26, in which the cooling oil sprayed onto the piston head 25 is distributed and for a short time dwells before it leaves through the opening 28 or a separate drain opening the shaker space 26 again.
Die Kühlölmenge, die durch die Spritzdüsen 23 austritt, wird durch einen rohrförmigen Walzenschieber 20 geregelt, der im Bereich der Einmündung des Spritzölkanals 22 in die Hauptdruckölleitung 19 eine Steueröffnung 21 besitzt. Diese kann durch Drehen des Walzenschiebers 20 um seine Längsachse zwischen einer Öffnungsposition und einer Schließposition kontinuierlich oder intermittierend verstellt werden. Hierzu dient ein Antriebselement 31, z.B. in Form einer Schraubenrad-, Schneckenrad- oder Stirnradverzahnung, in die ein entsprechendes Element eines Aktuators eingreift. Der Aktuator kann über eine elektronische Steuereinheit in Abhängigkeit relevanter Betriebsparameter der Brennkraftmaschine 10 aktiviert werden.The quantity of cooling oil which exits through the spray nozzles 23 is regulated by a tubular roller slide 20 which has a control opening 21 in the area of the mouth of the spray oil channel 22 into the main pressure oil line 19. This can be adjusted by rotating the roller slide 20 about its longitudinal axis between an open position and a closed position continuously or intermittently. A drive element 31, e.g. in the form of a helical gear, worm gear or spur gear toothing, in which a corresponding element of an actuator engages. The actuator can be activated via an electronic control unit as a function of relevant operating parameters of the internal combustion engine 10.
Um im geschlossenen Zustand der Steueröffnung 21 die Leckage über die Spritzdüsen 23 möglichst gering zu halten, ist zwischen der Außenkontur des Walzenschiebers 20 und der Innenkontur der Hauptöldruσkleitung 19 ein geringes Spiel vorgesehen. Dieses kann mit einem geringen Fertigungsaufwand und engen Fertigungstoleranzen hergestellt werden, in dem der Walzenschieber im Bereich der Steueröffnung 21 im Durchmesser vergrößert ist, sodass sich zum übrigen Teil des Walzenschiebers 20 ein Absatz 29 ergibt. Dadurch braucht der Walzenschieber 20 nur über eine relativ kurze axiale Erstreckung genau bearbeitet zu werden.In order to keep the leakage through the spray nozzles 23 as low as possible in the closed state of the control opening 21, a slight clearance is provided between the outer contour of the roller slide 20 and the inner contour of the main oil pressure line 19. This can be produced with a low production cost and tight manufacturing tolerances, in which the roller slide is increased in diameter in the region of the control opening 21, so that a heel 29 results for the remaining part of the roller slide 20. As a result, the roller slide 20 needs to be accurately processed only over a relatively short axial extent.
Um den Durchfluss zu den Hauptlagern der Kurbelwelle zu gewährleisten, die unabhängig von der Kühlung des Kolbens 13 ständig geschmiert werden müssen, sind im Walzenschieber im Bereich der Schmierölkanäle, die von der Hauptdruckölleitung 19 zu den Hauptlagern der Kurbelwelle führen, Öffnungen 30 vorgesehen, die sich in Umfangsrichtung über den Schwenkbereich des Walzenschiebers 20 erstrecken. Da an diesen Öffnungen 30 keine Steuerung des SchmierölStroms stattfindet, können die Öffnungen 30 auch in den Bereichen des Walzenschiebers 20 mit einem geringeren äußeren Durchmesser vorgesehen.In order to ensure the flow to the main bearings of the crankshaft, which must be constantly lubricated regardless of the cooling of the piston 13, openings 30 are provided in the roller valve in the area of the lubricating oil channels leading from the main pressure oil line 19 to the main bearings of the crankshaft extend in the circumferential direction over the pivoting range of the roller slide 20. Because at these openings 30 no control of the lubricating oil flow takes place, the openings 30 may also be provided in the areas of the roller slide 20 with a smaller outer diameter.
Damit der Walzenschieber 20 nicht falsch in die Hauptdruckleitung 19 eingesetzt werden kann, besitzt er an einer Stirnseite eine Aussparung 32, die an ihren Enden quer zur Umfangsrichtung Anschläge 33 besitzt, die mit einem entsprechenden Anschlag im Kurbelgehäuse 18 bzw. im Zylinderblock 11 zusammenwirken. Gleichzeitig wird durch die Anschläge 33 bewirkt, dass der Walzenschieber 20 nicht über den vorgesehenen Schwenkbereich hinaus verstellt werden kann. So that the roller slide 20 can not be incorrectly inserted into the main pressure line 19, it has on a front side a recess 32 which has transversely to the circumferential direction stops 33 at their ends, which cooperate with a corresponding stop in the crankcase 18 or in the cylinder block 11. At the same time causes by the stops 33 that the roller slide 20 can not be adjusted beyond the intended pivoting range addition.

Claims

Patentansprüche claims
1. Vorrichtung zum Regeln einer Kolbenkühlung einer Hubkolbenbrennkraftmaschine, die eine Hauptdruckölleitung aufweist, von der Schmierölkanäle zu Hauptlagern einer Kurbelwelle und Spritzölkanäle zu Spritzdüsen für die Kolbenkühlung abzweigen, dadurch gekennzeichnet, dass in der Hauptdruckölleitung (19) ein rohrförmiger1. A device for controlling a piston cooling a Hubkolbenbrennkraftmaschine having a main pressure oil line, branch off from the lubricating oil channels to main bearings of a crankshaft and spray oil ducts to spray nozzles for the piston cooling, characterized in that in the main pressure oil line (19) has a tubular
Walzenschieber (20) schwenkbar gelagert ist, der imRoller slide (20) is pivotally mounted in the
Bereich der abzweigenden Spritzölkanäle (22)Range of branching spray oil channels (22)
Steueröffnungen (21) aufweist, durch die der Durchfluss zu denControl orifices (21) through which the flow to the
Spritzölkanälen (22) gesteuert wird, und der im Bereich der Schmierölkanäle sich in Umfangsrichtung erstreckendeSpray oil channels (22) is controlled, and extending in the region of the lubricating oil channels in the circumferential direction
Öffnungen (30) besitzt, die über den gesamtenHas openings (30) over the entire
Schwenkbereich des Walzenschiebers (20) den Durchfluss zu den Lagern der Kurbelwelle ermöglichen.Swivel range of the roller slide (20) allow flow to the bearings of the crankshaft.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Walzenschieber (20) im Bereich der Steueröffnungen (21) im Außendurchmesser geringfügig vergrößert ist und mit einem Dichtspalt an der Innenwand der Hauptdruckölleitung (19) gleitet.2. Apparatus according to claim 1, characterized in that the roller slide (20) in the region of the control openings (21) in the outer diameter is slightly enlarged and with a sealing gap on the inner wall of the main pressure oil line (19) slides.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Walzenschieber (20) mit einem Antriebselement (31) verbunden ist, das von einem Aktuator betätigt wird. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Walzenschieber (20) an einer Stirnseite eine Aussparung (32) aufweist, die sich über den Schwenkbereich des Walzenschiebers (20) erstreckt und an ihren Enden Begrenzungsanschläge (33) besitzt, die mit mindestens einem Anschlag im Kurbelgehäuse (18) zusammenwirkt. 3. Apparatus according to claim 1 or 2, characterized in that in that the roller slide (20) is connected to a drive element (31) which is actuated by an actuator. Device according to one of the preceding claims, characterized in that the roller slide (20) on one end face has a recess (32) which extends over the pivoting range of the roller slide (20) and at its ends has limit stops (33) which at least a stop in the crankcase (18) cooperates.
PCT/EP2005/010407 2004-09-30 2005-09-27 Device for regulating piston cooling of a reciprocating internal combustion engine WO2006037515A1 (en)

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FR3048452A1 (en) * 2016-03-07 2017-09-08 Renault Sas COOLING JET OF PISTON

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DE102011085444A1 (en) * 2011-10-28 2013-05-02 Ks Kolbenschmidt Gmbh Method for cooling piston for internal combustion engine, involves enclosing two openings by cooling channel of internal combustion engine, where coolant flows through openings
DE102012004003A1 (en) 2012-02-25 2013-08-29 Daimler Ag Internal combustion engine for motor vehicle, has locking element fluidically blocking lubricant channel and preventing outflow of lubricant from lubricant channel in supply direction, in closing position of locking element
US9169801B2 (en) 2012-07-31 2015-10-27 Ford Global Technologies, Llc Internal combustion engine with oil-cooled cylinder block and method for operating an internal combustion engine of said type
DE102014009484A1 (en) 2014-06-26 2015-12-31 Daimler Ag Actuator for variably adjusting at least one compression ratio of a cylinder of a reciprocating engine
DE102014224841A1 (en) * 2014-12-04 2016-06-09 Volkswagen Aktiengesellschaft Internal combustion engine and method for operating an internal combustion engine
US9605620B2 (en) 2015-04-16 2017-03-28 Ford Global Technologies, Llc Systems and methods for piston cooling
DE102015009568B4 (en) * 2015-07-23 2021-02-11 Audi Ag Internal combustion engine with a control device for the targeted control of a piston cooling nozzle or a piston cooling duct and a method for operating an internal combustion engine

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FR2899935A1 (en) * 2006-04-13 2007-10-19 Peugeot Citroen Automobiles Sa Cooling oil injection controlling device for internal combustion engine`s piston, has distributor mounted in housing of cylinder to occupy closing and opening positions of nozzles for stopping and authorizing passage of oil, respectively
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